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AD/B767/235 - ECS Duct Assembly Insulation
Boeing 767 Series AeroplanesBoeing 767 Series Aeroplanes
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Boeing 767 Series Aeroplanes
| AD/B767/235 | ECS Duct Assembly Insulation | 3/2008 |
|---|
| Applicability: | Model 767-200 and 767-300 series aircraft, as identified in Boeing Service Bulletin 767-21A0167 Revision 1, or later FAA approved revision; excluding variable number VK031. |
|---|---|
| Requirement: | Action in accordance with the technical requirements of FAA AD 2008-02-16 Amdt 39-15346. |
| Compliance: | As specified in the Requirement document, with a revised effective date of13 March 2008. |
| This Airworthiness Directive becomes effective on 13 March 2008. | |
| Background: | The FAA received reports of duct assemblies in the environmental control system (ECS) with burned BMS 8-39 polyurethane foam insulation. Also a report received from the manufacturer that aircraft were assembled with duct assemblies in the ECS wrapped with BMS 8-39 polyurethane foam insulation, a material of which the fire retardant properties deteriorate with age. The actions of this Directive are intended to prevent a potential electrical arc from igniting the BMS 8-39 polyurethane foam insulation on the duct assemblies of the ECS. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
1 February 2008